Stamping die used for metal pipe mouth forming

Abstract

The invention discloses a stamping die used for metal pipe mouth forming. The stamping die comprises a lower die and an upper die, wherein the lower die is fixed above a work table through a fastening device, and the upper die corresponding to the lower die is installed on a press head. The fastening device of the lower die comprises a lower die fixing plate which is vertically fixed with the work table, one end of the lower die is fixedly connected with the lower die fixing plate, and the other end of the lower die extends out of the lower die fixing plate and is arranged to be parallel to the work table. The upper end face of one side, extending out of the lower die fixing plate, of the lower die is arranged to be a convex semi-circular-arc-shaped convex-press face, the convex-press face is sleeved on a metal pipe placed horizontally in a matched mode, a convex arris used for the pipe mouth forming is arranged on the convex press face along the circumference, a concave semi-circular-arc-shaped concave-press face is arranged on the lower end face of the upper die and used for press fitting of the metal pipe in a matched mode, and a groove is formed in the concave press face and matched with the convex arris to form a pipe mouth. The technical problem that an existing open type stamping device is used for forming the pipe end of a thin-wall medium-diameter pipe fitting is solved, and the stamping die used for the metal pipe mouth forming can carry out the pipe mouth forming machining on metal pipes with different pipe diameters.

Description

technical field [0001] The invention relates to a mold for mechanical processing, in particular to a mold used for stamping and forming the mouth of a metal pipe with ordinary stamping equipment. Background technique [0002] For diesel engine products, the air intake and oil inlet pipelines are complicated, and most of the nozzle connections of the pipelines adopt the structure of adjustable clamp clamping rubber hose connection. In the case of a certain pressure, the connection part of the straight nozzle is limited by its own structure, and the clamping capacity is insufficient, which easily causes the rubber hose to fall off. For this reason, many companies currently introduce nozzle forming machines to make the nozzle connection parts of metal pipes such as figure 1 In the structure shown, a circle of outwardly protruding boss structure is set at the connection position of the nozzle. The bosses are distributed along the circumference of the metal pipe, and the inner a...

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Problems solved by technology

In the prior art, there is an advanced nozzle forming machine that can directly process and shape the nozzle, but the equipment of the nozzle forming machine is very expensive. For small and medium-sized pipe fitting processing enterprises, a large amount of investment is required to use the advanced nozzle forming machine. Funds are used to purchase special equipment, and molds of different specifications are designed according to different pipe diameters, and the manufacturing cost of molds is also very high

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